1 | package de.ugoe.cs.eventbench.windows;
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2 |
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3 | import java.io.IOException;
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4 | import java.security.InvalidParameterException;
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5 | import java.util.HashMap;
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6 | import java.util.Iterator;
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7 | import java.util.LinkedList;
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8 | import java.util.List;
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9 | import java.util.ListIterator;
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10 | import java.util.Map;
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11 | import java.util.NoSuchElementException;
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12 |
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13 | import org.jdom.Document;
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14 | import org.jdom.Element;
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15 | import org.jdom.JDOMException;
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16 | import org.jdom.Namespace;
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17 | import org.jdom.input.SAXBuilder;
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18 |
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19 | import de.ugoe.cs.eventbench.data.Event;
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20 | import de.ugoe.cs.eventbench.windows.data.WindowTree;
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21 | import de.ugoe.cs.eventbench.windows.data.WindowTreeNode;
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22 | import de.ugoe.cs.eventbench.windows.data.WindowsEvent;
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23 | import de.ugoe.cs.eventbench.windows.data.WindowsMessage;
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24 | import de.ugoe.cs.util.console.Console;
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25 |
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26 | /**
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27 | * <p>
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28 | * Translates sequences of windows messages into {@link WindowsEvent}s that can
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29 | * be used by the EventBench core libraries.
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30 | * </p>
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31 | *
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32 | * @author Steffen Herbold
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33 | * @version 1.0
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34 | */
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35 | public class EventGenerator {
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36 |
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37 | /**
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38 | * <p>
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39 | * Helper method that fetches the document node of an XML file.
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40 | * </p>
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41 | *
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42 | * @param filename
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43 | * name of the XML file
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44 | * @return the document node
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45 | */
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46 | private static Document getDocument(String filename) {
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47 | SAXBuilder builder = new SAXBuilder();
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48 | Document doc = null;
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49 |
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50 | try {
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51 | doc = builder.build(filename);
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52 | rulesNamespace = Namespace.getNamespace("ul:rules");
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53 | } catch (JDOMException e) {
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54 | Console.printerrln("Invalid rules file.");
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55 | e.printStackTrace();
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56 | } catch (IOException e) {
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57 | Console.printerrln("Invalid rules file.");
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58 | e.printStackTrace();
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59 | }
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60 |
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61 | return doc;
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62 | }
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63 |
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64 | /**
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65 | * <p>
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66 | * Name and path of the XML files containing the rules.
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67 | * </p>
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68 | */
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69 | private String rulesFile;
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70 |
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71 | /**
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72 | * <p>
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73 | * Iterator used for the current sequence.
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74 | * </p>
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75 | */
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76 | private ListIterator<WindowsMessage> sequenceIterator;
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77 |
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78 | /**
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79 | * <p>
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80 | * Token that is currently being generated.
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81 | * </p>
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82 | */
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83 | private WindowsEvent currentToken;
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84 |
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85 | /**
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86 | * <p>
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87 | * Reference to the ul:rules namespace.
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88 | * </p>
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89 | */
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90 | private static Namespace rulesNamespace;
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91 |
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92 | /**
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93 | * <p>
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94 | * The name of the rule that is currently being evaluated.
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95 | * </p>
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96 | */
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97 | private String currentRuleName;
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98 |
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99 | /**
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100 | * <p>
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101 | * Internal message storage. Used to implement the
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102 | * <code>{@literal <store>}</code> and <code>{@literal <storeSeq>}</code>
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103 | * tags.
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104 | * </p>
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105 | */
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106 | private Map<String, Object> messageStorage;
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107 |
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108 | /**
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109 | * <p>
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110 | * Creates a new EventGenerator. Sets "rules/rules.xml" as default file for
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111 | * the rules.
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112 | * </p>
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113 | */
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114 | public EventGenerator() {
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115 | rulesFile = "rules/rules.xml";
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116 | }
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117 |
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118 | /**
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119 | * <p>
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120 | * Tries to match the rules to the given sequence to generate an
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121 | * {@link WindowsEvent}.
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122 | * </p>
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123 | * <p>
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124 | * The rules are matched the order, in which they are defined in the XML
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125 | * file. Therefore, the order of the rules in the file defines priorities,
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126 | * when multiple rules could be matched to the same sequence.
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127 | * </p>
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128 | *
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129 | * @param sequence
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130 | * sequence of message for which an event will be generated
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131 | * @return event that matches the messages; null, if no rule can be matched
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132 | */
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133 | @SuppressWarnings("unchecked")
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134 | public WindowsEvent generateEvent(List<WindowsMessage> sequence) {
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135 | Document rulesDoc = getDocument(rulesFile);
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136 | Element rulesRoot = rulesDoc.getRootElement();
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137 |
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138 | List<Element> ruleElements = rulesRoot.getChildren("rule",
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139 | rulesNamespace);
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140 |
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141 | boolean isMatch = false;
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142 |
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143 | for (int ruleIndex = 0; ruleIndex < ruleElements.size() && !isMatch; ruleIndex++) {
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144 | Element currentRule = ruleElements.get(ruleIndex);
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145 | currentRuleName = currentRule.getAttributeValue("name");
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146 | currentToken = new WindowsEvent(currentRuleName);
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147 | currentToken.setDecorator(MFCReplayDecorator.getInstance());
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148 | isMatch = true;
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149 | messageStorage = new HashMap<String, Object>();
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150 | sequenceIterator = sequence.listIterator();
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151 | List<Element> ruleChildrenMsg = currentRule.getChildren("msg",
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152 | rulesNamespace);
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153 |
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154 | int i = 0;
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155 | while (isMatch && i < ruleChildrenMsg.size()) {
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156 | Element messageElement = ruleChildrenMsg.get(i);
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157 | if ("true".equals(messageElement.getAttributeValue("multiple"))) {
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158 | Element nextMessageElement = null;
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159 | if (i + 1 < ruleChildrenMsg.size()) {
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160 | nextMessageElement = ruleChildrenMsg.get(i + 1);
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161 | }
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162 | try {
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163 | isMatch = matchMultipleMessages(messageElement,
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164 | nextMessageElement);
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165 | } catch (InvalidParameterException e) {
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166 | Console.printerrln(e.getMessage());
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167 | }
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168 | } else {
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169 | try {
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170 | isMatch = matchSingleMessage(messageElement);
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171 | } catch (InvalidParameterException e) {
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172 | Console.printerrln(e.getMessage());
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173 | }
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174 | }
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175 | i++;
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176 | }
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177 | if (isMatch) {
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178 | List<Element> ruleChildren = currentRule.getChildren();
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179 | for (Element genMsgElement : ruleChildren) {
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180 | if (genMsgElement.getName().equals("genMsg")) {
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181 | try {
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182 | generateReplayMessage(genMsgElement);
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183 | } catch (InvalidParameterException e) {
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184 | Console.printerrln(e.getMessage());
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185 | currentToken.invalidateReplay();
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186 | }
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187 | } else if (genMsgElement.getName().equals("genMsgSeq")) {
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188 | try {
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189 | generateReplaySequence(genMsgElement);
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190 | currentToken.invalidateReplay();
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191 | } catch (InvalidParameterException e) {
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192 | Console.printerrln(e.getMessage());
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193 | currentToken.invalidateReplay();
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194 | }
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195 | }
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196 | }
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197 | Element idinfoElement = currentRule.getChild("idinfo",
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198 | rulesNamespace);
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199 | if (idinfoElement != null) {
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200 | // cannot be empty if document is valid
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201 | List<Element> valueElements = idinfoElement.getChildren();
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202 | currentToken.setIdInfo(getTermValue(null,
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203 | valueElements.get(0)));
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204 | }
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205 | Console.traceln(currentRule.getAttributeValue("name")
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206 | + currentToken.getIdInfo() + " matched");
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207 | } else {
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208 | currentToken = null;
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209 | }
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210 | }
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211 | if (!isMatch) {
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212 | Console.traceln("no match found for sequence: "
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213 | + sequence.toString());
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214 | }
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215 | return currentToken;
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216 | }
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217 |
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218 | // ////////////////////////////////////////////////////////////
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219 | // Helper functions for matching of events, i.e., msg-nodes //
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220 | // ////////////////////////////////////////////////////////////
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221 |
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222 | /**
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223 | * <p>
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224 | * Handles msg-nodes where multiple is not true, i.e., not a sequences.
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225 | * </p>
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226 | *
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227 | * @param messageElement
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228 | * {@link Element} representing the msg-node
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229 | * @return true, if a match is found; false otherwise
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230 | */
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231 | private boolean matchSingleMessage(Element messageElement) {
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232 | boolean isMatch = false;
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233 | WindowsMessage currentMessage = null;
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234 |
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235 | int type = Integer.parseInt(messageElement.getAttributeValue("type"));
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236 |
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237 | while (!isMatch && sequenceIterator.hasNext()) {
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238 | /*
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239 | * traverses the messages from the current position forward till a
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240 | * message with the correct type is found
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241 | */
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242 | currentMessage = sequenceIterator.next();
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243 | if (type == currentMessage.getType()) {
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244 | // message with the correct type found
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245 | // eval child nodes for further matching/storing
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246 | isMatch = evalEqualRestrictions(currentMessage, messageElement);
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247 |
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248 | // in case the message is a match, eval storage children
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249 | if (isMatch) {
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250 | handleStorage(messageElement, currentMessage);
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251 | currentToken.setTarget(currentMessage
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252 | .getXmlWindowDescription());
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253 | currentToken
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254 | .setTargetShort(currentMessage.getParentNames());
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255 | }
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256 | }
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257 | }
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258 |
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259 | return isMatch;
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260 | }
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261 |
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262 | /**
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263 | * <p>
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264 | * Handles msg-nodes where multiple is true, i.e., sequences. Requires
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265 | * knowledge about the next msg-node to determine the end of the sequence.
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266 | * </p>
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267 | *
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268 | * @param messageElement
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269 | * {@link Element} representing the msg-node
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270 | * @param nextMessageElement
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271 | * {@link Element} representing the next msg-node; {@code null}
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272 | * if the current node is the last one
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273 | * @return true, if a sequence is matched; false otherwise
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274 | */
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275 | private boolean matchMultipleMessages(Element messageElement,
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276 | Element nextMessageElement) {
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277 | boolean isMatch = false;
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278 | boolean isCurrentMatch = false;
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279 | boolean nextMatchFound = false;
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280 | WindowsMessage currentMessage = null;
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281 | WindowsMessage nextMessage = null;
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282 |
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283 | int type = Integer.parseInt(messageElement.getAttributeValue("type"));
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284 |
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285 | int nextType = -1;
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286 | if (nextMessageElement != null) {
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287 | nextType = Integer.parseInt(nextMessageElement
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288 | .getAttributeValue("type"));
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289 | }
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290 |
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291 | while (!nextMatchFound && sequenceIterator.hasNext()) {
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292 | currentMessage = sequenceIterator.next();
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293 | if (type == currentMessage.getType()) {
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294 | isCurrentMatch = evalEqualRestrictions(currentMessage,
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295 | messageElement);
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296 | isMatch = isMatch || isCurrentMatch;
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297 |
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298 | if (isCurrentMatch) {
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299 | handleStorage(messageElement, currentMessage);
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300 | currentToken.setTarget(currentMessage
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301 | .getXmlWindowDescription());
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302 | currentToken
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303 | .setTargetShort(currentMessage.getParentNames());
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304 | }
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305 | }
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306 | if (nextMessageElement != null && isMatch) {
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307 | // peek next message to check if the sequence ends and the next
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308 | // match is found
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309 | if (!sequenceIterator.hasNext()) {
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310 | return false; // sequence is over, but not all messages are
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311 | // found
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312 | }
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313 | nextMessage = sequenceIterator.next();
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314 | sequenceIterator.previous();
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315 |
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316 | if (nextType == nextMessage.getType()) {
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317 | nextMatchFound = evalEqualRestrictions(nextMessage,
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318 | nextMessageElement);
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319 | }
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320 |
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321 | }
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322 | }
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323 |
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324 | return isMatch;
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325 | }
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326 |
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327 | /**
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328 | * <p>
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329 | * Handles equals-nodes.
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330 | * </p>
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331 | *
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332 | * @param currentMessage
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333 | * {@link Element} representing the msg-node the equals-node
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334 | * belongs to
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335 | * @param messageElement
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336 | * {@link Element} representing the equals-node to be evaluated
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337 | * @return true, if constraint is fulfilled; false otherwise
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338 | */
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339 | @SuppressWarnings("unchecked")
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340 | private boolean evalEqualRestrictions(WindowsMessage currentMessage,
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341 | Element messageElement) {
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342 | boolean isMatch = true;
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343 | for (Element childElement : (List<Element>) messageElement.getChildren(
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344 | "equals", rulesNamespace)) {
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345 | List<Element> termElements = childElement.getChildren();
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346 | // the size 2 of termElements is guaranteed by the XML schema
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347 | String value1 = getTermValue(currentMessage, termElements.get(0));
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348 | String value2 = getTermValue(currentMessage, termElements.get(1));
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349 | if (value1 == null || value2 == null) {
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350 | isMatch = false;
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351 | } else {
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352 | isMatch = isMatch && value1.equals(value2);
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353 | }
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354 | }
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355 | for (Element childElement : (List<Element>) messageElement.getChildren(
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356 | "equalsSeq", rulesNamespace)) {
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357 | List<Element> termElements = childElement.getChildren();
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358 | List<String> values1 = getTermValueSeq(termElements.get(0));
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359 | List<String> values2 = getTermValueSeq(termElements.get(0));
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360 | if (values1 == null || values2 == null) {
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361 | isMatch = false;
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362 | } else {
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363 | isMatch = isMatch && values1.equals(values2);
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364 | }
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365 | }
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366 | return isMatch;
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367 | }
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368 |
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369 | /**
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370 | * <p>
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371 | * Handles store-nodes and storeSeq-nodes.
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372 | * </p>
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373 | *
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374 | * @param messageElement
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375 | * {@link Element} representing the msg-node that is currently
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376 | * being evaluated
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377 | * @param currentMessage
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378 | * current message in the message sequence that is matched; this
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379 | * is the message that is stored
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380 | */
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381 | @SuppressWarnings("unchecked")
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382 | private void handleStorage(Element messageElement,
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383 | WindowsMessage currentMessage) {
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384 | for (Element childElement : (List<Element>) messageElement.getChildren(
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385 | "store", rulesNamespace)) {
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386 | String identifier = childElement.getAttributeValue("var");
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387 | messageStorage.put(identifier, currentMessage);
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388 | resolveHwnd(currentMessage, childElement);
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389 | }
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390 | for (Element childElement : (List<Element>) messageElement.getChildren(
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391 | "storeSeq", rulesNamespace)) {
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392 | String identifier = childElement.getAttributeValue("varSeq");
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393 | Object tmp = messageStorage.get(identifier);
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394 | List<WindowsMessage> storedSequence;
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395 | if (tmp == null || tmp instanceof WindowsMessage) {
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396 | storedSequence = new LinkedList<WindowsMessage>();
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397 | storedSequence.add(currentMessage);
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398 | messageStorage.put(identifier, storedSequence);
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399 | } else if (tmp instanceof List<?>) {
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400 | storedSequence = (List<WindowsMessage>) tmp;
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401 | storedSequence.add(currentMessage);
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402 | messageStorage.put(identifier, storedSequence);
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403 | }
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404 | resolveHwnd(currentMessage, childElement);
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405 | }
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406 | }
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407 |
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408 | /**
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409 | * <p>
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410 | * Resolves a parameter that contains a HWND of a message to the target
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411 | * string of the HWND and stores it.
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412 | * </p>
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413 | *
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414 | * @param currentMessage
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415 | * message whose HWND is resolved
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416 | * @param childElement
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417 | * child element of the store node that represents the resolve
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418 | */
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419 | @SuppressWarnings("unchecked")
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420 | private void resolveHwnd(WindowsMessage currentMessage, Element childElement) {
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421 | List<Element> resolveElements = childElement.getChildren("resolveHwnd",
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422 | rulesNamespace);
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423 | for (Element resolveElement : resolveElements) {
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424 | String param = resolveElement.getAttributeValue("param");
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425 | String storeParam = resolveElement.getAttributeValue("storeParam");
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426 | int paramHwnd = Integer
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427 | .parseInt(currentMessage.getParameter(param));
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428 | WindowTreeNode node = WindowTree.getInstance().find(paramHwnd);
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429 | if (node != null) {
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430 | currentMessage.addParameter(storeParam,
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431 | node.xmlRepresentation());
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432 | }
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433 | }
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434 | }
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435 |
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436 | // /////////////////////////////////////////////////////
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437 | // Helper functions for generating the replay, i.e.,
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438 | // parsing of genMsg und genMsgSeq-nodes
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439 | // /////////////////////////////////////////////////////
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440 |
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441 | /**
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442 | * <p>
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443 | * Handles genMsg-nodes and adds the replay to the {@link Event} that is
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444 | * generated.
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445 | * </p>
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446 | *
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447 | * @param genMsgElement
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448 | * {@link Element} representing the genMsg-node
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449 | */
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450 | @SuppressWarnings("unchecked")
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451 | private void generateReplayMessage(Element genMsgElement) {
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452 | List<Element> genMsgChildren = genMsgElement.getChildren();
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453 | WindowsMessage generatedMessage = null;
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454 | if (genMsgChildren.size() == 1) { // replay stored message without
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455 | // change
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456 | String obj = genMsgChildren.get(0).getAttributeValue("obj");
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457 | generatedMessage = getStoredMessageVariable(null, obj);
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458 | } else { // generate message according to the rule
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459 | for (Element genMsgChild : genMsgChildren) {
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460 | Element termElement = (Element) genMsgChild.getChildren()
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461 | .get(0);
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462 | if (genMsgChild.getName().equals("type")) {
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463 | try {
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464 | int msgType = Integer.parseInt(getTermValue(null,
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465 | termElement));
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466 | generatedMessage = new WindowsMessage(msgType);
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467 | } catch (NumberFormatException e) {
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468 | throw new InvalidParameterException(
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469 | "Failure generating replay sequence for rule "
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470 | + currentRuleName
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471 | + ": Defined type is not an integer.");
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472 | }
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473 | } else if (genMsgChild.getName().equals("target")) {
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474 | String targetString = getTermValue(null, termElement);
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475 | generatedMessage.setXmlWindowDescription(targetString);
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476 | } else if (genMsgChild.getName().equals("LPARAM")) {
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477 | String paramValueStr = getTermValue(null, termElement);
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478 | long paramValue = 0;
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479 | Element loword = genMsgChild.getChild("LOWORD",
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480 | rulesNamespace);
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481 | if (loword != null) {
|
---|
482 | paramValue = loHiWord(genMsgChild);
|
---|
483 | generatedMessage.setLPARAM(paramValue);
|
---|
484 | } else {
|
---|
485 | try {
|
---|
486 | paramValue = Integer.parseInt(paramValueStr);
|
---|
487 | generatedMessage.setLPARAM(paramValue);
|
---|
488 | } catch (NumberFormatException e) {
|
---|
489 | generatedMessage
|
---|
490 | .setLPARAMasWindowDesc(paramValueStr);
|
---|
491 | }
|
---|
492 | }
|
---|
493 | } else if (genMsgChild.getName().equals("WPARAM")) {
|
---|
494 | String paramValueStr = getTermValue(null, termElement);
|
---|
495 | long paramValue = 0;
|
---|
496 | Element loword = genMsgChild.getChild("LOWORD",
|
---|
497 | rulesNamespace);
|
---|
498 | if (loword != null) {
|
---|
499 | paramValue = loHiWord(genMsgChild);
|
---|
500 | generatedMessage.setWPARAM(paramValue);
|
---|
501 | } else {
|
---|
502 | try {
|
---|
503 | paramValue = Integer.parseInt(paramValueStr);
|
---|
504 | generatedMessage.setWPARAM(paramValue);
|
---|
505 | } catch (NumberFormatException e) {
|
---|
506 | generatedMessage
|
---|
507 | .setWPARAMasWindowDesc(paramValueStr);
|
---|
508 | }
|
---|
509 | }
|
---|
510 | }
|
---|
511 | }
|
---|
512 | }
|
---|
513 | if (generatedMessage != null) {
|
---|
514 | int delay = Integer.parseInt(genMsgElement
|
---|
515 | .getAttributeValue("delay"));
|
---|
516 | generatedMessage.setDelay(delay);
|
---|
517 | } else {
|
---|
518 | currentToken.invalidateReplay();
|
---|
519 | }
|
---|
520 | currentToken.addReplayEvent(generatedMessage);
|
---|
521 | }
|
---|
522 |
|
---|
523 | /**
|
---|
524 | * Handles genMsgSeq-nodes and adds the replay to the {@link Event} that is
|
---|
525 | * generated.</p>
|
---|
526 | *
|
---|
527 | * @param genMsgElement
|
---|
528 | * {@link Element} representing the genMsgSeq-node.
|
---|
529 | */
|
---|
530 | @SuppressWarnings("unchecked")
|
---|
531 | private void generateReplaySequence(Element genMsgElement) {
|
---|
532 | List<Element> genMsgSeqChildren = genMsgElement.getChildren();
|
---|
533 | List<WindowsMessage> generatedMessageSeq = new LinkedList<WindowsMessage>();
|
---|
534 | if (genMsgSeqChildren.size() == 1) {
|
---|
535 | String obj = genMsgSeqChildren.get(0).getAttributeValue("seqObj");
|
---|
536 | generatedMessageSeq = getStoredSeqVariable(obj);
|
---|
537 | } else {
|
---|
538 | boolean msgsGenerated = false;
|
---|
539 | int constMsgType = 0;
|
---|
540 | for (Element genMsgSeqChild : genMsgSeqChildren) {
|
---|
541 | Element termElement = (Element) genMsgSeqChild.getChildren()
|
---|
542 | .get(0);
|
---|
543 | if (genMsgSeqChild.getName().equals("type")) {
|
---|
544 | // note: cannot easily be extracted because of mulitple
|
---|
545 | // return values
|
---|
546 | if (termElement.getName().equals("seqValue")) {
|
---|
547 | String obj = termElement.getAttributeValue("seqObj");
|
---|
548 | List<WindowsMessage> seqVar = getStoredSeqVariable(obj);
|
---|
549 | for (WindowsMessage msg : seqVar) {
|
---|
550 | generatedMessageSeq.add(new WindowsMessage(msg
|
---|
551 | .getType()));
|
---|
552 | }
|
---|
553 | msgsGenerated = true;
|
---|
554 | } else { // constValue type
|
---|
555 | constMsgType = Integer.parseInt(getTermValue(null,
|
---|
556 | termElement));
|
---|
557 | }
|
---|
558 | } else if (genMsgSeqChild.getName().equals("target")) {
|
---|
559 | msgsGenerated = createSequenceTarget(generatedMessageSeq,
|
---|
560 | msgsGenerated, constMsgType, termElement);
|
---|
561 | } else if (genMsgSeqChild.getName().equals("LPARAM")) {
|
---|
562 | msgsGenerated = createSequenceLParam(generatedMessageSeq,
|
---|
563 | msgsGenerated, constMsgType, termElement);
|
---|
564 | } else if (genMsgSeqChild.getName().equals("WPARAM")) {
|
---|
565 | msgsGenerated = createSequenceWParam(generatedMessageSeq,
|
---|
566 | msgsGenerated, constMsgType, termElement);
|
---|
567 | }
|
---|
568 | }
|
---|
569 | }
|
---|
570 | currentToken.addReplaySequence(generatedMessageSeq);
|
---|
571 | }
|
---|
572 |
|
---|
573 | /**
|
---|
574 | * <p>
|
---|
575 | * Creates the targets for replay sequences generated with genMsgSeq-nodes.
|
---|
576 | * </p>
|
---|
577 | *
|
---|
578 | * @param generatedMessageSeq
|
---|
579 | * list of the messages that is being generated
|
---|
580 | * @param msgsGenerated
|
---|
581 | * boolean stating if the list of messages is already generated
|
---|
582 | * or if the generation has to be handles by this method
|
---|
583 | * @param constMsgType
|
---|
584 | * a constant message type that is used for message generation,
|
---|
585 | * in case the list of message is generated by this method
|
---|
586 | * @param termElement
|
---|
587 | * {@link Element} representing the term-node describing the
|
---|
588 | * target
|
---|
589 | * @return true, if the list of message is generated after calling this
|
---|
590 | * method; false otherwise
|
---|
591 | * @throws NoSuchElementException
|
---|
592 | * thrown if the seqVar referred to in the termElement contains
|
---|
593 | * a different number of messages than is contained in
|
---|
594 | * messageSeq
|
---|
595 | */
|
---|
596 | private boolean createSequenceTarget(
|
---|
597 | List<WindowsMessage> generatedMessageSeq, boolean msgsGenerated,
|
---|
598 | int constMsgType, Element termElement)
|
---|
599 | throws NoSuchElementException {
|
---|
600 | Iterator<WindowsMessage> seqIterator = generatedMessageSeq.iterator();
|
---|
601 | if (termElement.getName().equals("seqValue")) {
|
---|
602 | String obj = termElement.getAttributeValue("seqObj");
|
---|
603 | List<WindowsMessage> seqVar = getStoredSeqVariable(obj);
|
---|
604 | if (msgsGenerated && seqVar.size() != generatedMessageSeq.size()) {
|
---|
605 | throw new InvalidParameterException(
|
---|
606 | "Failure generating replay sequence for rule "
|
---|
607 | + currentRuleName
|
---|
608 | + ": One or more of the sequence variables used to generate a sequence have different lenghts.");
|
---|
609 | }
|
---|
610 | for (WindowsMessage msg : seqVar) {
|
---|
611 | WindowsMessage currentSeqMsg = getCurrentSeqMsg(
|
---|
612 | generatedMessageSeq, msgsGenerated, constMsgType,
|
---|
613 | seqIterator);
|
---|
614 | String targetString = msg.getParameter(termElement
|
---|
615 | .getAttributeValue("param"));
|
---|
616 | currentSeqMsg.setXmlWindowDescription(targetString);
|
---|
617 | }
|
---|
618 | msgsGenerated = true;
|
---|
619 | } else { // const value
|
---|
620 | throw new AssertionError("target must be a sequence variable!");
|
---|
621 | /*
|
---|
622 | * If target would not be a variable, the message-elements could not
|
---|
623 | * yet be created and the whole sequence might be broken. If this is
|
---|
624 | * to be changed, createSequenceLParam and createSequenceWParam need
|
---|
625 | * to be addepted, too.
|
---|
626 | */
|
---|
627 | }
|
---|
628 | return msgsGenerated;
|
---|
629 | }
|
---|
630 |
|
---|
631 | /**
|
---|
632 | * <p>
|
---|
633 | * Creates the LPARAMs for replay sequences generated with genMsgSeq-nodes.
|
---|
634 | * </p>
|
---|
635 | *
|
---|
636 | * @param generatedMessageSeq
|
---|
637 | * list of the messages that is being generated
|
---|
638 | * @param msgsGenerated
|
---|
639 | * boolean stating if the list of messages is already generated
|
---|
640 | * or if the generation has to be handles by this method
|
---|
641 | * @param constMsgType
|
---|
642 | * a constant message type that is used for message generation,
|
---|
643 | * in case the list of message is generated by this method
|
---|
644 | * @param termElement
|
---|
645 | * {@link Element} representing the term-node describing the
|
---|
646 | * LPARAM
|
---|
647 | * @return true, if the list of message is generated after calling this
|
---|
648 | * method; false otherwise
|
---|
649 | * @throws NoSuchElementException
|
---|
650 | * thrown if the seqVar referred to in the termElement contains
|
---|
651 | * a different number of messages than is contained in
|
---|
652 | * messageSeq
|
---|
653 | */
|
---|
654 | private boolean createSequenceLParam(
|
---|
655 | List<WindowsMessage> generatedMessageSeq, boolean msgsGenerated,
|
---|
656 | int constMsgType, Element termElement)
|
---|
657 | throws NoSuchElementException {
|
---|
658 | Iterator<WindowsMessage> seqIterator = generatedMessageSeq.iterator();
|
---|
659 | if (termElement.getName().equals("seqValue")) {
|
---|
660 | String obj = termElement.getAttributeValue("seqObj");
|
---|
661 | List<WindowsMessage> seqVar = getStoredSeqVariable(obj);
|
---|
662 | if (msgsGenerated && seqVar.size() != generatedMessageSeq.size()) {
|
---|
663 | throw new InvalidParameterException(
|
---|
664 | "Failure generating replay sequence for rule "
|
---|
665 | + currentRuleName
|
---|
666 | + ": One or more of the sequence variables used to generate a sequence have different lenghts.");
|
---|
667 | }
|
---|
668 | for (WindowsMessage msg : seqVar) {
|
---|
669 | WindowsMessage currentSeqMsg = getCurrentSeqMsg(
|
---|
670 | generatedMessageSeq, msgsGenerated, constMsgType,
|
---|
671 | seqIterator);
|
---|
672 | String paramValueStr = msg.getParameter(termElement
|
---|
673 | .getAttributeValue("param"));
|
---|
674 | int paramValue = 0;
|
---|
675 | try {
|
---|
676 | paramValue = Integer.parseInt(paramValueStr);
|
---|
677 | currentSeqMsg.setLPARAM(paramValue);
|
---|
678 | } catch (NumberFormatException e) {
|
---|
679 | currentSeqMsg.setLPARAMasWindowDesc(paramValueStr);
|
---|
680 | }
|
---|
681 | }
|
---|
682 | if (seqIterator.hasNext()) {
|
---|
683 | // the first seq-var has a different number of elements than the
|
---|
684 | // current one
|
---|
685 | throw new NoSuchElementException();
|
---|
686 | }
|
---|
687 | msgsGenerated = true;
|
---|
688 | } else { // const value
|
---|
689 | int paramValue = Integer.parseInt(getTermValue(null, termElement));
|
---|
690 | while (seqIterator.hasNext()) {
|
---|
691 | seqIterator.next().setLPARAM(paramValue);
|
---|
692 | }
|
---|
693 | }
|
---|
694 | return msgsGenerated;
|
---|
695 | }
|
---|
696 |
|
---|
697 | /**
|
---|
698 | * <p>
|
---|
699 | * Creates the WPARAMs for replay sequences generated with genMsgSeq-nodes.
|
---|
700 | * </p>
|
---|
701 | *
|
---|
702 | * @param generatedMessageSeq
|
---|
703 | * list of the messages that is being generated
|
---|
704 | * @param msgsGenerated
|
---|
705 | * boolean stating if the list of messages is already generated
|
---|
706 | * or if the generation has to be handles by this method
|
---|
707 | * @param constMsgType
|
---|
708 | * a constant message type that is used for message generation,
|
---|
709 | * in case the list of message is generated by this method
|
---|
710 | * @param termElement
|
---|
711 | * {@link Element} representing the term-node describing the
|
---|
712 | * WPARAM
|
---|
713 | * @return true, if the list of message is generated after calling this
|
---|
714 | * method; false otherwise
|
---|
715 | * @throws NoSuchElementException
|
---|
716 | * thrown if the seqVar referred to in the termElement contains
|
---|
717 | * a different number of messages than is contained in
|
---|
718 | * messageSeq
|
---|
719 | */
|
---|
720 | private boolean createSequenceWParam(
|
---|
721 | List<WindowsMessage> generatedMessageSeq, boolean msgsGenerated,
|
---|
722 | int constMsgType, Element termElement)
|
---|
723 | throws NoSuchElementException {
|
---|
724 | Iterator<WindowsMessage> seqIterator = generatedMessageSeq.iterator();
|
---|
725 | if (termElement.getName().equals("seqValue")) {
|
---|
726 | String obj = termElement.getAttributeValue("seqObj");
|
---|
727 | List<WindowsMessage> seqVar = getStoredSeqVariable(obj);
|
---|
728 | if (msgsGenerated && seqVar.size() != generatedMessageSeq.size()) {
|
---|
729 | throw new InvalidParameterException(
|
---|
730 | "Failure generating replay sequence for rule "
|
---|
731 | + currentRuleName
|
---|
732 | + ": One or more of the sequence variables used to generate a sequence have different lenghts.");
|
---|
733 | }
|
---|
734 | for (WindowsMessage msg : seqVar) {
|
---|
735 | WindowsMessage currentSeqMsg = getCurrentSeqMsg(
|
---|
736 | generatedMessageSeq, msgsGenerated, constMsgType,
|
---|
737 | seqIterator);
|
---|
738 | String paramValueStr = msg.getParameter(termElement
|
---|
739 | .getAttributeValue("param"));
|
---|
740 | int paramValue = 0;
|
---|
741 | try {
|
---|
742 | paramValue = Integer.parseInt(paramValueStr);
|
---|
743 | currentSeqMsg.setWPARAM(paramValue);
|
---|
744 | } catch (NumberFormatException e) {
|
---|
745 | currentSeqMsg.setWPARAMasWindowDesc(paramValueStr);
|
---|
746 | }
|
---|
747 | }
|
---|
748 | if (seqIterator.hasNext()) {
|
---|
749 | // the first seq-var has a different number of elements than the
|
---|
750 | // current one
|
---|
751 | throw new NoSuchElementException();
|
---|
752 | }
|
---|
753 | msgsGenerated = true;
|
---|
754 | } else { // const value
|
---|
755 | int paramValue = Integer.parseInt(getTermValue(null, termElement));
|
---|
756 | while (seqIterator.hasNext()) {
|
---|
757 | seqIterator.next().setWPARAM(paramValue);
|
---|
758 | }
|
---|
759 | }
|
---|
760 | return msgsGenerated;
|
---|
761 | }
|
---|
762 |
|
---|
763 | /**
|
---|
764 | * <p>
|
---|
765 | * If a message sequence is already generated, i.e., msgsGenerated is true,
|
---|
766 | * the seqIterator is used to iterate through these messages and return the
|
---|
767 | * current one. If the message sequence is not yet generated, i.e.,
|
---|
768 | * msgsGenerated is false, the message sequence is generated on the fly
|
---|
769 | * during each call of this message and the newly generated messages are
|
---|
770 | * returned.
|
---|
771 | * </p>
|
---|
772 | *
|
---|
773 | * @param generatedMessageSeq
|
---|
774 | * message sequence
|
---|
775 | * @param msgsGenerated
|
---|
776 | * indicates if generatedMessageSeq is already generated or has
|
---|
777 | * to be generated on the fly by this method
|
---|
778 | * @param constMsgType
|
---|
779 | * type of the message to be used for message generation
|
---|
780 | * @param seqIterator
|
---|
781 | * iterates through an already generated message sequence; must
|
---|
782 | * not be {@code null}, if msgsGenerated is true
|
---|
783 | * @return current message
|
---|
784 | */
|
---|
785 | private WindowsMessage getCurrentSeqMsg(
|
---|
786 | List<WindowsMessage> generatedMessageSeq, boolean msgsGenerated,
|
---|
787 | int constMsgType, Iterator<WindowsMessage> seqIterator) {
|
---|
788 | WindowsMessage currentSeqMsg = null;
|
---|
789 | if (msgsGenerated) {
|
---|
790 | currentSeqMsg = seqIterator.next();
|
---|
791 | } else {
|
---|
792 | currentSeqMsg = new WindowsMessage(constMsgType);
|
---|
793 | generatedMessageSeq.add(currentSeqMsg);
|
---|
794 | }
|
---|
795 | return currentSeqMsg;
|
---|
796 | }
|
---|
797 |
|
---|
798 | // ////////////////////////////
|
---|
799 | // General helper functions //
|
---|
800 | // ////////////////////////////
|
---|
801 |
|
---|
802 | /**
|
---|
803 | * <p>
|
---|
804 | * Retrieves a message from the storage for, e.g., comparison or replay.
|
---|
805 | * "this" is used to refer to the current message.
|
---|
806 | * </p>
|
---|
807 | *
|
---|
808 | * @param currentMessage
|
---|
809 | * current message during the parsing; passed to handle "this"
|
---|
810 | * @param obj
|
---|
811 | * object identifier in the storage
|
---|
812 | * @return message retrieved from the storage
|
---|
813 | * @throws InvalidParameterException
|
---|
814 | * thrown in case of invalid uses of "this" or if no message
|
---|
815 | * with the identifier obj is found in the storage
|
---|
816 | */
|
---|
817 | private WindowsMessage getStoredMessageVariable(
|
---|
818 | WindowsMessage currentMessage, String obj)
|
---|
819 | throws InvalidParameterException {
|
---|
820 | WindowsMessage varMessage = null;
|
---|
821 | if (obj.equals("this")) {
|
---|
822 | if (currentMessage == null) {
|
---|
823 | throw new InvalidParameterException(
|
---|
824 | "Failure obtaining term value for rule "
|
---|
825 | + currentRuleName
|
---|
826 | + ": \"this\" is not a valid name for generating runtime messages.");
|
---|
827 | }
|
---|
828 | varMessage = currentMessage;
|
---|
829 | } else {
|
---|
830 | Object tmp = messageStorage.get(obj);
|
---|
831 | if (tmp instanceof WindowsMessage) {
|
---|
832 | varMessage = (WindowsMessage) tmp;
|
---|
833 | } else {
|
---|
834 | throw new InvalidParameterException(
|
---|
835 | "Failure obtaining term value for rule "
|
---|
836 | + currentRuleName + ": No message \"" + obj
|
---|
837 | + "\" stored.");
|
---|
838 | }
|
---|
839 | }
|
---|
840 | return varMessage;
|
---|
841 | }
|
---|
842 |
|
---|
843 | /**
|
---|
844 | * <p>
|
---|
845 | * Retrieves a stored message sequence from the storage.
|
---|
846 | * </p>
|
---|
847 | *
|
---|
848 | * @param obj
|
---|
849 | * object identifier in the storage
|
---|
850 | * @return message sequence retrieved from the storage
|
---|
851 | * @throws InvalidParameterException
|
---|
852 | * thrown if no message sequences with the identifier obj is
|
---|
853 | * found in the storage
|
---|
854 | */
|
---|
855 | @SuppressWarnings("unchecked")
|
---|
856 | private List<WindowsMessage> getStoredSeqVariable(String obj)
|
---|
857 | throws InvalidParameterException {
|
---|
858 | List<WindowsMessage> varMsgSeq = null;
|
---|
859 | Object tmp = messageStorage.get(obj);
|
---|
860 | if (tmp instanceof List<?>) {
|
---|
861 | varMsgSeq = (List<WindowsMessage>) tmp;
|
---|
862 | } else {
|
---|
863 | throw new InvalidParameterException(
|
---|
864 | "Failure obtaining term value for rule " + currentRuleName
|
---|
865 | + ": No sequence \"" + obj + "\" store.");
|
---|
866 | }
|
---|
867 | return varMsgSeq;
|
---|
868 | }
|
---|
869 |
|
---|
870 | /**
|
---|
871 | * <p>
|
---|
872 | * Handles term-nodes and returns the value of the described term.
|
---|
873 | * </p>
|
---|
874 | *
|
---|
875 | * @param currentMessage
|
---|
876 | * current message during the parsing; required to resolve
|
---|
877 | * references to "this" in a term
|
---|
878 | * @param termElement
|
---|
879 | * {@link Element} representing the term node
|
---|
880 | * @return value of the term or {@code null} of the term node could not be
|
---|
881 | * evaluated
|
---|
882 | */
|
---|
883 | private String getTermValue(WindowsMessage currentMessage,
|
---|
884 | Element termElement) {
|
---|
885 | String value = null;
|
---|
886 | WindowsMessage varMessage = null;
|
---|
887 | if (termElement.getName().equals("constValue")) {
|
---|
888 | value = termElement.getAttributeValue("value");
|
---|
889 | } else if (termElement.getName().equals("paramValue")) {
|
---|
890 | String objectName = termElement.getAttributeValue("obj");
|
---|
891 | varMessage = getStoredMessageVariable(currentMessage, objectName);
|
---|
892 | if (varMessage != null) {
|
---|
893 | String param = termElement.getAttributeValue("param");
|
---|
894 | value = varMessage.getParameter(param);
|
---|
895 | }
|
---|
896 | } else if (termElement.getName().equals("winInfoValue")) {
|
---|
897 | String objectName = termElement.getAttributeValue("obj");
|
---|
898 | varMessage = getStoredMessageVariable(currentMessage, objectName);
|
---|
899 | if (varMessage != null) {
|
---|
900 | String paramString = termElement.getAttributeValue("winParam");
|
---|
901 | if (paramString.equals("class")) {
|
---|
902 | value = varMessage.getWindowClass();
|
---|
903 | } else if (paramString.equals("resourceId")) {
|
---|
904 | value = "" + varMessage.getWindowResourceId();
|
---|
905 | } else if (paramString.equals("hwnd")) {
|
---|
906 | value = "" + varMessage.getHwnd();
|
---|
907 | } else if (paramString.equals("parentTarget")) {
|
---|
908 | String target = varMessage.getXmlWindowDescription();
|
---|
909 | int index = target.lastIndexOf("<");
|
---|
910 | if (index == 0) {
|
---|
911 | Console.println("Trying to adress parent of top-level window! Replay probably invalid!");
|
---|
912 | }
|
---|
913 | value = target.substring(0, index);
|
---|
914 | } else if (paramString.equals("parentClass")) {
|
---|
915 | value = varMessage.getParentClass();
|
---|
916 | }
|
---|
917 | }
|
---|
918 | } else if (termElement.getName().equals("msgInfoValue")) {
|
---|
919 | String objectName = termElement.getAttributeValue("obj");
|
---|
920 | varMessage = getStoredMessageVariable(currentMessage, objectName);
|
---|
921 | if (varMessage != null) {
|
---|
922 | String paramString = termElement.getAttributeValue("msgParam");
|
---|
923 | if (paramString.equals("type")) {
|
---|
924 | value = "" + varMessage.getType();
|
---|
925 | } else if (paramString.equals("target")) {
|
---|
926 | value = varMessage.getXmlWindowDescription();
|
---|
927 | }
|
---|
928 | }
|
---|
929 | }
|
---|
930 | return value;
|
---|
931 | }
|
---|
932 |
|
---|
933 | /**
|
---|
934 | * <p>
|
---|
935 | * Handles term-nodes contained by equalSeq nodes.
|
---|
936 | * </p>
|
---|
937 | *
|
---|
938 | * @param termElement
|
---|
939 | * {@link Element} representing the term-node
|
---|
940 | * @return list of values of the term
|
---|
941 | */
|
---|
942 | private List<String> getTermValueSeq(Element termElement) {
|
---|
943 | List<String> values = new LinkedList<String>();
|
---|
944 | if (termElement.getName().equals("seqValue")) {
|
---|
945 | String obj = termElement.getAttributeValue("seqObj");
|
---|
946 | String param = termElement.getAttributeValue("param");
|
---|
947 | List<WindowsMessage> seqVar = getStoredSeqVariable(obj);
|
---|
948 |
|
---|
949 | for (WindowsMessage msg : seqVar) {
|
---|
950 | // msg.getParameter returns null, if parameter is not found,
|
---|
951 | // therefore the List can contain null-values
|
---|
952 | values.add(msg.getParameter(param));
|
---|
953 | }
|
---|
954 | }
|
---|
955 | return values;
|
---|
956 | }
|
---|
957 |
|
---|
958 | /**
|
---|
959 | * <p>
|
---|
960 | * Handles LOWORD and HIWORD child nodes of LPARAM and WPARAM nodes. The
|
---|
961 | * returned value is the LPARAM/WPARAM value based on the LOWORD and HIWORD.
|
---|
962 | * </p>
|
---|
963 | *
|
---|
964 | * @param param
|
---|
965 | * {@link Element} representing the LPARAM/WPARAM node
|
---|
966 | * @return value of the LPARAM/WPARAM
|
---|
967 | */
|
---|
968 | private long loHiWord(Element param) {
|
---|
969 | Element loword = param.getChild("LOWORD", rulesNamespace);
|
---|
970 | Element hiword = param.getChild("HIWORD", rulesNamespace);
|
---|
971 | String lowordStr = getTermValue(null, (Element) loword.getChildren()
|
---|
972 | .get(0));
|
---|
973 | String hiwordStr = getTermValue(null, (Element) hiword.getChildren()
|
---|
974 | .get(0));
|
---|
975 | return MAKEPARAM(Short.parseShort(lowordStr),
|
---|
976 | Short.parseShort(hiwordStr));
|
---|
977 | }
|
---|
978 |
|
---|
979 | /**
|
---|
980 | * <p>
|
---|
981 | * Takes to short integers and combines them into the high and low order
|
---|
982 | * bits of an integer.
|
---|
983 | * </p>
|
---|
984 | *
|
---|
985 | * @param loword
|
---|
986 | * low word
|
---|
987 | * @param hiword
|
---|
988 | * high word
|
---|
989 | * @return combined integer
|
---|
990 | */
|
---|
991 | private static int MAKEPARAM(short loword, short hiword) {
|
---|
992 | return loword | ((int) hiword) << Short.SIZE;
|
---|
993 | }
|
---|
994 |
|
---|
995 | }
|
---|